Primer and gas-saver for gasolene-engines.



L. O. DEMERS.

PRIMER AND GAS SAVER FOR GASOLENE ENGINES.

APPLICATION FILED JAN. 27, 1915- Patented-M11020,1916.

Fig.1.

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lnvenTor. Louis O. Derners,

Witnesses YdM8rM'-' Atig UFlFlhOlEt LCPUIS 0. DEMERS, F BOSTON, MASSACHUSETTS.

ran/inn. Ann ens-seven non GASOLENE-ENGINES.

Specification of Letters Patent. Patented June 20, 1916.

Application filed January 27, 1915. Serial No. 4,762.

To all whom it may concern:

Be it lmown that I, Loms'O. DEMERs, a subject of the King of Great Britain, residing at Boston county of Suffolk, State of Massachusetts, have invented an Improve-i ment in Primers and Gas-Savers for Gaso-' lene-Engines, of which the following description, in connection with the accompanying drawing; is a specification, like characters on the drawing representing like parts.'

This invention relates to a combined primer and gas saver for gasolene engines by which the starting of the engine when cold can be facilitated, and by which a savingdn 15 gasolene is efi'ec'ted after the engine has been running for a while and is thoroughly invention is especially designed for connection with automobile engines, it is capable of use with gasolene engines for operating motor boats or other types of gasolene engines.

1 improved device is simple in'construcis effective both in assisting to start inc and in the saving of gasolene e engine is thoroughly warmed up. order to give an understanding of my in vcntion have illustrated in thedrawings a selected nbodiment thereof which will he described, after which the novel as of the invention will be pointed out appended claim. jire l. is a partial view of an automo bile showing the engipe therein equipped with my improved Fig. 2 is a sectional. view through tli'e'primer; Fig. 3 is a detail sectional. view showing another embod nent of my invention.

It: ha hown at a portion of an automobile having an engine 2, the engine herein illu rated being afour-cylinder engine, the cyii tiers of which are supplied with gasoez vapor through. the usual manifold 3 that isponnected by a pipe 4 with the carbureter .the top or. the manifold 3 and is provided o The carbureter shown. as connected by end of the port 12 and closes said port.

proved primer is shown at 9 andit| extends through the dash-board 8 and has connected thereto a flange 10 which is secured to the dash-board and by which the pump is held 65 in position. At the lower end of the pump cylinder is a head or connection 11 provided with a discharge port 12 which is normally. closed by an outwardly-opening check valve 13, said valve being held to its seat by a suit- 70 able spring 14'. The springlet is held in position by a, nipple member 15 which is screw-threaded into the end of the member 11, and this nipple member 15 is connected by a suitable coupling 16 with a delivery pipe 17 that leads into the manifold '33; The lower end of the pipe 17 is shown as coupled I to a distributing plug 18 which screws into with we lateral ports 19 extending in opposite directions, said ports being directed to-- ward the two ends of the manifold 3. The head or connecting member 11 has also detachably secured thereto an inlet connecting member 20, said member being shown as pro- 85 vided with a screw-threaded nipple 21 that screws into thelgead 11. This member is proyided. Witlnan inwardly-opening check valve 22 and is connected by a suitable coupling 23 with a supply pipe 24 which in turn is connected to the gasolene pipe 6.

Operating in the cylinderl) is a piston 25 of any suitable construction, the piston rod 26 ortvhich extends through the head 27 of the cylinder and is provided with a suitable cross piece or handle 28 by which it may be operated, A spring 29 encircles the piston rod a -nd acts at one end against the head 27 and at the other end against the piston 25, said spring tending normally to urge the piston toward the lower end of the cylinder. Associated with the piston 25 is a valve 1 member 30 which when the piston is in the position shown in Fig. 2 seats against the In order to prime the engine with the priming device-herein illustrated the operator merely draws backwardly on the head 28 of the piston thereby to draw lnto the cylinder a charge of gasolene from the pipe .eia, i 1,187,977

6 and through the pipe 24. The operator then forces the piston downwardly, during the .manifold, the gasolene will escape through the two ports 19' and will. thus be divided into two streams or'jets that are di rected toward each end of the manifold.

The charge of gasolene will, therefore, be

evenly distributed throughout the manifold so that any one of the four cylinders can receive a priming charge as-soon as the engine 1s started.

.When the piston occupies the position shown in Fig.- 2 the valve 30 will positively close the port 12 so that when the engine starts there will be no danger or possibility that the suction 1n the mamfold Wlll draw gas olene from the pipe 6 through tlltpiptt 24rd17ism'lghtoclurunlesssome'posi a Ive valve were provided for thls purpose. When, therefore, the engine is running and the piston is in the position shown in Fig. 2,

the presence of the primer will not afiectthe engine in any way. The spring 29 serves as a means for auto: matically keeping the valve 30 closed against the end of the port 12;When the device is not in use, and, therefore the, operator does not need to manipulate any special valve'to shut the primer off from the engine when it is not in use. This is quite an important feature of my invention.

In Fig. 3 I have illustrated a different embodiment of my invention wherein a double valve is provided to close communication between the pipe 24L and the pipe 17 when the primer is not in-use. In this embodiment of the invention the duct through the inlet connecting member 20 communicates with a port 40 leading into the cylinder 9, which port is normally closed by the piston 25 when the valve 30 is seated. With this construction it will be seen that when the primer is notin use and the parts assume their normal position the communication between thepipes 24 and -17will be closed that the piston 25 covers the port 40. There is thus a double check against any possible leakage of gasolene from the pipe 24: into the pipe 17. p v

My improved device is also constructed so as-to effect a saving of ga'solene after the trolled check valve 60. This check valve 60 is adjusted so that the suction developed in the pipe 17 when the engine starts and be-' I accomfore the engine is thoroughlyv warmed up, will be insufficient to open the check valve. After the engine has been running for son e time and has become thoroughly heated, a "greater suction. will be produced in the manifold and pipe 17 and the check vvalve 60 is adjusted so that this increased suction will open it, thus admitting air to the manifold which will mix with the charge delivered to the manifold from the carbureter, thus effecting an economy in the use of the gasolene. This check valve 60 may be constructed various ways without departing from my invention. "In the illustrated 'embodiment the check valve iscontained in a nipple 62 which is screw-threaded to the connection or head ll, said nipple having a valve seat to receive the valve 60. The valve is provided with a stem 63 extending up through the nipple 62, and a. spring 64 encircles the valve um and 1s confiul between the nip" [it and nut it Stilt lnulad to it valve stem, said spring serving to hold the valve seated; The nipple is provided with air inlet ports 66. As stated above, the spring 64: will be so adjusted that the suction produced open to allow an added quantity of air to be delivered to the manifold. My invention is simple in construction and effective in operation. The priming of the engine merely involves an outward and inward movement of the piston, and when the piston has been thusmanipulated, the pipe 24 is automatically shut off from the pipe 17. The gassaving feature of the invention is automatic in its operation and requires no manipulanot only by the valve 30, but also. by the fact tion on the part of the operator.

.While I have illustrated herein a selected embodiment of my invention, I do not wish to be limited to the constructional features shown.

I claim:

In a device of the class described, the combination with a manifold of a gasolene engine, a carburetor connected thereto, and a gasolene supply pipe, of a priming pump comprising a cylinder having inlet and outlet ports, one connected to the gasolene supply pipe and the other to the manifold, check valves for said ports, a piston within said cylinder constructed to close both ports when it is at the end of its stroke, an automatiinthe pipe 17 when the engine starts will be sally-opening air inlet valve, said cylinder hanging a head provided with means for se 'curing thereto said air inlet valve, whereby saidair inlet valve is placed in communication with the outlet port on thedischerge side of the check Valve controlling the same.

In testimony whereof, have signed my name to this specification in the presence of two subscrlbing WlilIlGSSBS- LOUIS 0. DEMERS.

Witnesses: v

JBERTHA 1F. HEUSER, THOMAS J. DRUMMOND. 

